Single return bubbling with weak water flow

Schottfamily

Member
Jul 9, 2020
19
Jacksonville, Florida
I've noticed that when my vsp Jandy pump is running on low speed one of my three returns is bubbling and has a very weak flow. The return in question is the farthest from the pump. The bubbling alternates between several small bubbles and one to two large bubbles about every 15 - 45 seconds. Any suggestions? Should this be a cause for concern?
 

mas985

TFP Expert
LifeTime Supporter
May 3, 2007
14,007
Pleasanton, CA
Pool Size
20000
Surface
Plaster
Chlorine
Salt Water Generator
Most likely the bubbles are from your SWG. I get the same before on lower speeds. If you want to experiment to prove this, turn of the SWG, run the pump on high for a few minutes until the bubbles stop, and then switch to low and see if the bubbles continue or stop.
 
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mas985

TFP Expert
LifeTime Supporter
May 3, 2007
14,007
Pleasanton, CA
Pool Size
20000
Surface
Plaster
Chlorine
Salt Water Generator
I wouldn't worry about the lower flow on one return. If it feels strong on high speed, the return is fine. Issue is most likely due to the run length of that return vs the other returns. PBs don't go much out of their way to make sure the lines have equal head loss.
 
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